Warp stop-motion for looms.



" "0,690,636. v Patehtd-lan. 7, 1902.:

J. coLnwELL .&. c. a. GILDARD.

WARP STOP motion FOB LOUMS.

iApplica-tiozi filed. I53 19, 1900. '(No Model.) 1 3 SheetsSheet l.

Jsepfi Caldwell,

5m: pogzms PETERS ca, PHOTO-LITNQ, wAsumu'rom mm v Patented Ian. 7 I902. .1. COLDWELL & 0.1;. GILDARD.

WARP STOP mono" FOB LOOMS.

(Application filed Dec 19,-1900.)

3 Sheets-Sheet 3.

(No Model.)

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UNITED STATES PATENT OFFICE.

JOSEPH COLDWELL AND CHRISTOPHER GILES GILDARD, OF FALL RIVER,

' MASSACHUSETTS.

WARP STOP-MOTION FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 690,636, dated January 7, 1962.

Application filed December 19, 1900. Serial No. 40,341. (No model.)

To allwhom it may concern.-

Be it known that we, JOSEPH COLDWELL and CHRISTOPHER GILES GILDARD, citizens of the United States, residing at Fall River, in the county of Bristol and State of Massachusetts, have invented new and useful Improvements in \Varp Stop-Motions for Looms, of which the following is a specification.

Our invention relates to improvements in warp stop-motions for looms, and has special reference to improvements upon those constructions of stop-motions forming the subjects matter of certain prior patents heretofore granted us. 7

Among the objects of our present invention are to provide a construction wherein the circuitrods are positively braced and maintained in parallelism and in proper relative position with the contact-bar, whereby the drop-bars or detectors mayinstantly upon the breakage of a warp-thread fall and establish electrical connection with the contact-bar, they (the detectors) being thus always maintained in proper relative position with the said contact-bar for this purpose; to strengthen by suitable bracing and maintain in proper relative position against any displacement of an accidental nature the circuit-rods and also the lease-rods and, if desired, also the detector-retaining rods; to provide a novel form of drop-bar or detector which is adapted to be secured within the loom in such manner as to obviate any possibility of a careless omission upon the part of the loom operator or weaver of the same and its reconnection with a warp-- thread subsequent to a break and which it is impossible to throw oif'or out of operative position by the beat of the loom or otherwise, and, finally,- to simplify the various parts composing the stop-motion and adapt them' to be readily and simply combined as a whole.

Other objects and advantages of the invention will hereinafter appear, and the novel features thereof will be particularly; pointed out in the claims.

Referring to the drawings, Figure 1 is a side elevation of a loom-frame, showing our inn-- proved stop-motion applied thereto. Fig. 2

is a plan view of a portion of that part of the.

loom occupied by the lease-rods and other elements and which for convenience we shall 'tectors being in position.

ings.

term the head. Fig. 3 is a central longitudinal sectional View of the head. Fig. 4is a transverse vertical sectional view of the same, the viewbeing taken near one end thereof and the warp-threads and drop-bars or de- Fig. 5 is a similar view, the section being taken at an intermediate or more central point, the lower portion of the bracket being broken away and the warp-threads and drop-bars or detectors removed to prevent obscuring the parts beyond. Fig. 6 is an enlarged plan viewof a portion of the head, the lease-rod brackets being re- -moved. Fig. 7 is a detail in perspective of one of the lease-rod brackets. Fig. 8 is a detail in elevation of a modified form of bridgepiece, the preferred form being shown in dotted lines in said figure and also in Fig. 5. Fig. 9 is a perspective view of our improved and preferred form of drop-bar or detector. Fig. 10 is an edge view or elevation thereof. Similar characters of reference indicate similar parts in all the figures of the draw- In Fig. 1 we have illustrated one conventional form of mechanism for electrically op-' erating the usual belt-shifter of a loom, the same being thrown into and out of operation by the, establishment of an electrical current -or circuit upon the breaking of one or more warp-threads and the subsequent falling of thedrop-bar or'detector supported thereby and contacting with the remaining terminal of the circuit. Such beinga well-known construction and operation, it is not deemed necessary to describe the same in detail. In the present instance 1 designates the usual side frames of a loom, between which is located and preferably made adjustable 0 by bolt-and-slot connections 2 a pair of L- shaped main brackets 3. These main brackets 3 are disposed inwardlyaud upwardly, and between their upper ends and angles are formed rest-lugs 4., in which'may, be seated 5 and either rigidly or rotatably supported-a contact-bar 5. In the present instance the contact-bar is fixedly mounted, and, while it it may be of any other form or construction than that shown, is tubular, the ends being reo fitted with plugs 6, of wood or other-materiel. i and shaped to fit within the rest-lugs 4, ill

which position they may be secured by a screw 7, passed upwardly through one of the said lugs and into the said plug. One of these main brackets 3 may be suitably perforated, as at S, to receive an insulating-tube 9, by which one of the electric terminals or conducting-wires may be conducted to an axial bore in the adjacent plug 6 and from thence to the interior of the tubularcontactbar 5, in which latter said terminal may end in any form of electrical connection-as, for instance, a coil 10. The upper ends of the main brackets is each provided with a pair of inwardly-disposed or parallel lugs or ears 11, the same being preferably slightly converged toward their upper edges and each having formed therein a longitudinal slot 12. Between these pairs of lugs or ears 11 is located a pair of horizontal circuit-rods 13,which preferably converge toward their upper edges, partaking of the same disposition of the lugs or ears 11. These circuitrods are seen red to the lugs 11 by means of adjusting-bolts 14, which are passed through the said slots 12 and the said circuit-rods, the latter being thus supported above and at each side of the axial center of the contact-bar 5. Immediately below the lugs 11 the main bracket 3 is also provided each with small perforations 15, which receive the ends or terminals of a pair of light parallel retaining rods or wires 16, which are, when not held in position by means hereinafter described, capable of being withdrawn from said brackets endwise.

Located at the upper ends of the main brackets 3 and having their under sides recessed,as at 17, to give access to the nuts on the inner ends of the adjusting-bolts 14: is a pair of L- shaped lease-rod brackets 18, which though somewhat smaller than yet substantially con form to the shape of the main brackets 3. The lower ends of the lease-rod brackets 18 cover the perforations 15, and therefore overlap the ends of the retaining-rods 16, and thus when in position preventing said rods from endwise withdrawal. The two brackets 3 and 18 are correspondingly perforated to receive a pair of securing-bolts 19. The upper adjacent faces of the two brackets 18 each has formed thereon a pair of studs 20, the same taking into the ends of and therefore supporting the tubular lease-rods 21, located above and outside of the circuit-rods 13.

At the rear of the head, in substantially horizontal alinement with the circuit-rods 13, is a yoke-brace 22,preferably formed of angleiron and terminating in securing-plates 23, longitudinally-slotted,as at 24, and arranged face to face with the rear pair of lugs 1.1. This yoke-brace may be secured in position by the bolts 14, employed to secure the outer circuit-rod to its supporting-lugs.

Atintervals-say, for example, eightinches apart-we may form upon the yoke-brace forwardly-disposed lugs 25, each of which is perforated to receive a bolt or screw 26. Bridgepieces 27, (best shown in Fig. 5,) corresponding-rods 16 could be omitted, if desired.

ing in number to the lugs 25 are alsoemployed, each of such pieces having a shank 28,which lying upon the adjacent lug 25 is secured thereto in a rigid manner by the screw or bolt 26,before mentioned. Each bridge-piece has its lower edge provided with a pair of slots or kerfs 29, which receive, embrace, and aid in retaining in proper relative position the circuit-bars 13. The bridge-pieces may furthermore each terminate at its upper end in a bifurcation or fork 30, the ends of such bifurcations being provided with substantially halfround recesses 31, that receive the lease-rods 21. The two lower corners of each bridgepiece 27 may be,and preferably are, provided with perforations 32, all of which aline with the perforations 15 of the main brackets 3, and are therefore designed to receive the dropbar or detector retaining rods 16. From this it will be seen that all of those parts which in any way aid in supporting and guiding the drop-bars or detectors, either directly or indirectly, relative to the contact-bar are securely strengthened and most rigidly braced, so that no movement whateverthat would tend toward a failure upon the part of any of the drop-bars or detectors to instantly establish an electrical current upon the breaking of a warpthread can possibly occur.

Inasmuch as the lease-rods are of consider able strength in themselves'and only in an indirect manner (through the warp-threads) support the drop-bars or detectors,the bridgepieces 27 need not be extended to receive the lease-rods, as indicated in Figs. 5 and 8, but may terminate immediately above the circuit rods, as shown in full lines, Fig. 8.

The construction of stop-motion described may be used in connection with the usual bifurcated or U-shaped drop-bar or detector, and of course if such be the case the retain- If retained, they would simply act as an aid to the circuit-rods in accurately guiding the drop-bars or detectors in their travel toward the contact-bar. We prefer, however, to employ in this connection adrop-bar or detector of substantially the design or form illustrated in Figs. 4:, 9, and 10that is, of the bifurcated or U-shaped style, very similar to that now in use, except that it is also provided at its outer side with some means for causing it to engage the drop-bar or detector securing rods 16. As perhaps the most practicable means for producing this function we prefer to form at one side of one of the tines 33 of an ordinary bifurcated detector 3t an extension 35, which extends from a point near the lower end of the tine to a point somewhat above the transverse center thereof and to form in said extension a longitudinal slot 36 of a width exceeding the diameter of the rod 16.

The warp-threads a and b occupy their usual positions on the lease-rods, and between the latter and suspended by the threads are the drop-bars or detectors 3;, the same being located at opposite sides of the intersection of said threads, and therefore forming two opposite banks or series, one suspended bythe warp-threads a and the other by the warpping the loom, which latter cannot again be operated until the weaver has caught up the thread and replaced it through the eye of the drop-bar or detector, which latter cannot be carelessly discarded or accidentally omitted by the weaver, as is now very frequently the case. Furthermore, it will be obvious that the locking of the drop-bars or detectors by the rods 16 prevents them from being accidentally thrown off their respective warpthreads by the beat of the loom or otherwise, as is sometimes the case with the ordinary form of bifurcated drop-bar or detector.

It will be observed that the rods 16 are held against endwise displacement by the lower ends of thelease-rod brackets 18, which cover the small openings or perforations 15 in the main brackets 3. When it is desired to remove the rods and drop-wires, the same may be accomplished by a loosening of the nuts of the bolts 19 and a subsequent tilting to alternately opposite sides of the lease-rod brackets, the bolts 19 acting as pivots for this purpose. If the bridge-pieces are extended to also embrace the lease-rods, the screws or bolts 26 must likewiseibe removed.

We do not limit our invention to the precise details of construction herein shown and described, but hold that we may vary the same to any degree necessary and within the scope of our claims or the knowledge of the skilled mechanic.

Having described our invention, what we claim is 1. As an article of manufacture, a drop-bar bifurcated at its lower end to form a threadreceiving opening and having one of its bifurcations provided with a longitudinal slot. 2. The herein-described drop-bar or detector,- the same being formed with a circuit-rodreceiving opening, and at one side thereofwith a retaining-rod-receiving closed slot.

3. The combination, in a stop-motion for looms, of a circuit-rod, a contact-bar therebelow, a series of drop-bars or detectors loosely mounted on the circuit-rod-and adapted to be suspended above the contact-bar by the warpthreads of the loom, and each provided at one side with an elongated slot, and a retainingrod passed through the slots of the series of drop-bars or detectors to limit their longitudinal movements. 1

4. The combination, in a stop-motion for looms, of opposite cirouit-rods,'a lower intermediate contact-bar, and opposite drop-bars or detector-retaining rods, of opposite series of detectors or drop-bars adapted to be supported by the warp-threads of the loom and mounted loosely on said circuit-rods and provided at their outer sides with longitudinal slots receiving the said retaining-rods, wh ereby the longitudinal movements of the said drop bars or conductors are limited, and whereby an undesired removal thereof isprevented.

5. In a loom, the combination with circuitrods and their supports, of bridge-pieces conmeeting the same, and a transversely-disposed yoke-brace supported adjacent at one side thereof and connected rigidly to said bridge-' pieces. K

6. In a loom, the combination with circuitrods, supports for the same, and bridge-pieces recessed to receive the said circuit-rods, of a yoke-brace located at one side of said circuitrods and connected rigidly to the support thereof and to each of said bridge-pieces.-

7. In a loom, the combination with a pair of brackets rising from the loom-frame, a pair of cars extending inwardly from each of the same, and circuit-rods bolted'to the ears, of bridge-pieces mounted upon and connecting the bars, and a transverse yoke-brace connected-to the bridge-pieces and terminating securing-plates and secured to the ears of the brackets by the same bolts that connect the latter to the circuit-rods.

8. In a loom, the combination with opposite brackets, a pair of lease-rods and their supports,.and a pair of circuit-rods below the lease rods, of bridge-pieces connecting the cir cuit-rods and lease-rods.

9. In a loom, the combination with a pairof lease-rods and their supports, a pair of circuit-rods supported below the. lease-rods, of bridge-pieces connecting the circuit-rods and lease rods, and a longitudinally disposed yoke-brace supported atone side of and secured to the said bridge-pieces.

10. In a loom, the combination with opposite supports, a pair of circuit-rods supported thereby, of a series of bridge-pieces connecting the circuit-rods and provided with per-f forations alining with similar perforations formed in the said supports, opposite series of drop-bars or detectors bifurcated to loosely receive the circuit-rods and adapted to be supported by the warp-threads of the loom, andprovided at one side with alongitudinal slot, and opposite retaining-rods passedthrough said slots and the alining openings in the bridge-pieces and supports.

site supports, a pair of circuit-rods supported thereby, of a series of bridge-pieces connecting the circuit-rods and provided with perforations alining with similar perforations 11. In a loom, the combination with oppoformed in the said supports, opposite series of drop-bars or detectors bifurcated to receive the circuit-rods and adapted to besupported by the warp-threads of the loom, and pro &

vided at one side with a longitudinal slot, and opposite retaining-rods passed through said slots and the alining openings in the bridgepieces and supports, and means for securing said retaining-rods against accidental withdrawal.

12. In a loom, the combination of a pair of supports, a pair of circuitrods connected thereto, a contact-bar carried by the supports, said supports being provided with perforations, a series of bridge-pieces connecting the circuit-rods and provided with perforations alining with said perforations in the supports, bifurcated drop bars or detectors loosely mounted on the circuit-rods and each provided at one side with a slot, retaining-rods located in the perforations of the bridgepieces and supports and in the slots of said drop-bars or detectors, and lease-rod-supporting brackets mounted upon said supports and overlapping the perforations thereof.

13. In a loom, the combination of a pair of supports, a pair of circuit-rods connected thereto, a contact-bar carried by the supports, said supports being provided with perforations, a series of bridge-pieces connecting the circuit-rods and provided with perforations alinin g with said perforations in the supports, bifurcated drop bars or detectors loosely mounted on the circuit-rods and each provided at one side with a slot, retaining-rods located in the perforations in the bridge-- pieces and supports and in the slots of said drop-bars or detectors, lease-rod-supporting brackets mounted upon said supports and overlapping the perforations thereof, and bolts for pivoting the lease-rod brackets upon the supports, whereby the brackets may be tilted to expose either of the perforations in said supports.

14. In a loom, the combination with opposite supports and circuit rods supported thereby, of the bridge-pieces 27, having the slots 29 and shanks 28, mounted on the circuit-rods, the yoke-brace having lugs 25, and connections between the lugs and shanks.

15. In a loom, the combination, with the opposite supports, the circuit-rods connected thereto, and the yoke-brace also connected to the said supports, of the lease-rod brackets, the lease-rods supported thereby, and the bridge-pieces 27, slotted as at 29, to receive the circuit-rods, and having their upper ends bifurcated as at 30, and recessed as at 31, to receive the lease-rods.

In testimony whereof we aflix our signatures in presence of two witnesses.

JOSEPH GOLDWELL. CHRISTOPHER GILES GILDARD. Witnesses:

N. CLIFFORD LUSCOMB, WM. A. RAMSBOTTOM. 

